2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * <2005> Wim Taymans <wim@fluendo.com>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
28 #include <gst/audio/audio.h>
29 #include "gstdvdemux.h"
30 #include "gstsmptetimecode.h"
33 * SECTION:element-dvdemux
35 * dvdemux splits raw DV into its audio and video components. The audio will be
36 * decoded raw samples and the video will be encoded DV video.
38 * This element can operate in both push and pull mode depending on the
39 * capabilities of the upstream peer.
42 * <title>Example launch line</title>
44 * gst-launch-1.0 filesrc location=test.dv ! dvdemux name=demux ! queue ! audioconvert ! alsasink demux. ! queue ! dvdec ! xvimagesink
45 * ]| This pipeline decodes and renders the raw DV stream to an audio and a videosink.
49 /* DV output has two modes, normal and wide. The resolution is the same in both
50 * cases: 720 pixels wide by 576 pixels tall in PAL format, and 720x480 for
53 * Each of the modes has its own pixel aspect ratio, which is fixed in practice
54 * by ITU-R BT.601 (also known as "CCIR-601" or "Rec.601"). Or so claims a
55 * reference that I culled from the reliable "internet",
56 * http://www.mir.com/DMG/aspect.html. Normal PAL is 59/54 and normal NTSC is
57 * 10/11. Because the pixel resolution is the same for both cases, we can get
58 * the pixel aspect ratio for wide recordings by multiplying by the ratio of
59 * display aspect ratios, 16/9 (for wide) divided by 4/3 (for normal):
61 * Wide NTSC: 10/11 * (16/9)/(4/3) = 40/33
62 * Wide PAL: 59/54 * (16/9)/(4/3) = 118/81
64 * However, the pixel resolution coming out of a DV source does not combine with
65 * the standard pixel aspect ratios to give a proper display aspect ratio. An
66 * image 480 pixels tall, with a 4:3 display aspect ratio, will be 768 pixels
67 * wide. But, if we take the normal PAL aspect ratio of 59/54, and multiply it
68 * with the width of the DV image (720 pixels), we get 786.666..., which is
69 * nonintegral and too wide. The camera is not outputting a 4:3 image.
71 * If the video sink for this stream has fixed dimensions (such as for
72 * fullscreen playback, or for a java applet in a web page), you then have two
73 * choices. Either you show the whole image, but pad the image with black
74 * borders on the top and bottom (like watching a widescreen video on a 4:3
75 * device), or you crop the video to the proper ratio. Apparently the latter is
76 * the standard practice.
78 * For its part, GStreamer is concerned with accuracy and preservation of
79 * information. This element outputs the 720x576 or 720x480 video that it
80 * receives, noting the proper aspect ratio. This should not be a problem for
81 * windowed applications, which can change size to fit the video. Applications
82 * with fixed size requirements should decide whether to crop or pad which
83 * an element such as videobox can do.
86 #define NTSC_HEIGHT 480
87 #define NTSC_BUFFER 120000
88 #define NTSC_FRAMERATE_NUMERATOR 30000
89 #define NTSC_FRAMERATE_DENOMINATOR 1001
91 #define PAL_HEIGHT 576
92 #define PAL_BUFFER 144000
93 #define PAL_FRAMERATE_NUMERATOR 25
94 #define PAL_FRAMERATE_DENOMINATOR 1
96 #define PAL_NORMAL_PAR_X 16
97 #define PAL_NORMAL_PAR_Y 15
98 #define PAL_WIDE_PAR_X 64
99 #define PAL_WIDE_PAR_Y 45
101 #define NTSC_NORMAL_PAR_X 8
102 #define NTSC_NORMAL_PAR_Y 9
103 #define NTSC_WIDE_PAR_X 32
104 #define NTSC_WIDE_PAR_Y 27
106 GST_DEBUG_CATEGORY_STATIC (dvdemux_debug);
107 #define GST_CAT_DEFAULT dvdemux_debug
109 static GstStaticPadTemplate sink_temp = GST_STATIC_PAD_TEMPLATE ("sink",
112 GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) true")
115 static GstStaticPadTemplate video_src_temp = GST_STATIC_PAD_TEMPLATE ("video",
118 GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) false")
121 static GstStaticPadTemplate audio_src_temp = GST_STATIC_PAD_TEMPLATE ("audio",
124 GST_STATIC_CAPS ("audio/x-raw, "
125 "format = (string) " GST_AUDIO_NE (S16) ", "
126 "layout = (string) interleaved, "
127 "rate = (int) { 32000, 44100, 48000 }, " "channels = (int) {2, 4}")
131 #define gst_dvdemux_parent_class parent_class
132 G_DEFINE_TYPE (GstDVDemux, gst_dvdemux, GST_TYPE_ELEMENT);
134 static void gst_dvdemux_finalize (GObject * object);
136 /* query functions */
137 static gboolean gst_dvdemux_src_query (GstPad * pad, GstObject * parent,
139 static gboolean gst_dvdemux_sink_query (GstPad * pad, GstObject * parent,
142 /* convert functions */
143 static gboolean gst_dvdemux_sink_convert (GstDVDemux * demux,
144 GstFormat src_format, gint64 src_value, GstFormat dest_format,
145 gint64 * dest_value);
146 static gboolean gst_dvdemux_src_convert (GstDVDemux * demux, GstPad * pad,
147 GstFormat src_format, gint64 src_value, GstFormat dest_format,
148 gint64 * dest_value);
150 /* event functions */
151 static gboolean gst_dvdemux_send_event (GstElement * element, GstEvent * event);
152 static gboolean gst_dvdemux_handle_src_event (GstPad * pad, GstObject * parent,
154 static gboolean gst_dvdemux_handle_sink_event (GstPad * pad, GstObject * parent,
157 /* scheduling functions */
158 static void gst_dvdemux_loop (GstPad * pad);
159 static GstFlowReturn gst_dvdemux_flush (GstDVDemux * dvdemux);
160 static GstFlowReturn gst_dvdemux_chain (GstPad * pad, GstObject * parent,
163 /* state change functions */
164 static gboolean gst_dvdemux_sink_activate (GstPad * sinkpad,
166 static gboolean gst_dvdemux_sink_activate_mode (GstPad * sinkpad,
167 GstObject * parent, GstPadMode mode, gboolean active);
168 static GstStateChangeReturn gst_dvdemux_change_state (GstElement * element,
169 GstStateChange transition);
172 gst_dvdemux_class_init (GstDVDemuxClass * klass)
174 GObjectClass *gobject_class;
175 GstElementClass *gstelement_class;
177 gobject_class = (GObjectClass *) klass;
178 gstelement_class = (GstElementClass *) klass;
180 gobject_class->finalize = gst_dvdemux_finalize;
182 gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_dvdemux_change_state);
183 gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_dvdemux_send_event);
185 gst_element_class_add_static_pad_template (gstelement_class, &sink_temp);
186 gst_element_class_add_static_pad_template (gstelement_class, &video_src_temp);
187 gst_element_class_add_static_pad_template (gstelement_class, &audio_src_temp);
189 gst_element_class_set_static_metadata (gstelement_class,
190 "DV system stream demuxer", "Codec/Demuxer",
191 "Uses libdv to separate DV audio from DV video (libdv.sourceforge.net)",
192 "Erik Walthinsen <omega@cse.ogi.edu>, Wim Taymans <wim@fluendo.com>");
194 GST_DEBUG_CATEGORY_INIT (dvdemux_debug, "dvdemux", 0, "DV demuxer element");
198 gst_dvdemux_init (GstDVDemux * dvdemux)
202 dvdemux->sinkpad = gst_pad_new_from_static_template (&sink_temp, "sink");
203 /* we can operate in pull and push mode so we install
204 * a custom activate function */
205 gst_pad_set_activate_function (dvdemux->sinkpad,
206 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_activate));
207 /* the function to activate in push mode */
208 gst_pad_set_activatemode_function (dvdemux->sinkpad,
209 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_activate_mode));
210 /* for push mode, this is the chain function */
211 gst_pad_set_chain_function (dvdemux->sinkpad,
212 GST_DEBUG_FUNCPTR (gst_dvdemux_chain));
213 /* handling events (in push mode only) */
214 gst_pad_set_event_function (dvdemux->sinkpad,
215 GST_DEBUG_FUNCPTR (gst_dvdemux_handle_sink_event));
216 /* query functions */
217 gst_pad_set_query_function (dvdemux->sinkpad,
218 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_query));
220 /* now add the pad */
221 gst_element_add_pad (GST_ELEMENT (dvdemux), dvdemux->sinkpad);
223 dvdemux->adapter = gst_adapter_new ();
225 /* we need 4 temp buffers for audio decoding which are of a static
226 * size and which we can allocate here */
227 for (i = 0; i < 4; i++) {
228 dvdemux->audio_buffers[i] =
229 (gint16 *) g_malloc (DV_AUDIO_MAX_SAMPLES * sizeof (gint16));
234 gst_dvdemux_finalize (GObject * object)
239 dvdemux = GST_DVDEMUX (object);
241 g_object_unref (dvdemux->adapter);
243 /* clean up temp audio buffers */
244 for (i = 0; i < 4; i++) {
245 g_free (dvdemux->audio_buffers[i]);
248 G_OBJECT_CLASS (parent_class)->finalize (object);
251 /* reset to default values before starting streaming */
253 gst_dvdemux_reset (GstDVDemux * dvdemux)
255 dvdemux->frame_offset = 0;
256 dvdemux->audio_offset = 0;
257 dvdemux->video_offset = 0;
258 dvdemux->discont = TRUE;
259 g_atomic_int_set (&dvdemux->found_header, 0);
260 dvdemux->frame_len = -1;
261 dvdemux->need_segment = FALSE;
262 dvdemux->new_media = FALSE;
263 dvdemux->framerate_numerator = 0;
264 dvdemux->framerate_denominator = 0;
266 dvdemux->frequency = 0;
267 dvdemux->channels = 0;
268 dvdemux->wide = FALSE;
269 gst_segment_init (&dvdemux->byte_segment, GST_FORMAT_BYTES);
270 gst_segment_init (&dvdemux->time_segment, GST_FORMAT_TIME);
271 dvdemux->segment_seqnum = 0;
272 dvdemux->upstream_time_segment = FALSE;
273 dvdemux->have_group_id = FALSE;
274 dvdemux->group_id = G_MAXUINT;
275 dvdemux->tag_event = NULL;
279 have_group_id (GstDVDemux * demux)
283 event = gst_pad_get_sticky_event (demux->sinkpad, GST_EVENT_STREAM_START, 0);
285 if (gst_event_parse_group_id (event, &demux->group_id))
286 demux->have_group_id = TRUE;
288 demux->have_group_id = FALSE;
289 gst_event_unref (event);
290 } else if (!demux->have_group_id) {
291 demux->have_group_id = TRUE;
292 demux->group_id = gst_util_group_id_next ();
295 return demux->have_group_id;
299 gst_dvdemux_create_global_tag_event (GstDVDemux * dvdemux)
301 gchar rec_datetime[40];
305 tags = gst_tag_list_new (GST_TAG_CONTAINER_FORMAT, "DV", NULL);
306 gst_tag_list_set_scope (tags, GST_TAG_SCOPE_GLOBAL);
308 if (dv_get_recording_datetime (dvdemux->decoder, rec_datetime)) {
309 rec_dt = gst_date_time_new_from_iso8601_string (rec_datetime);
311 gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE, GST_TAG_DATE_TIME,
313 gst_date_time_unref (rec_dt);
317 return gst_event_new_tag (tags);
321 gst_dvdemux_add_pad (GstDVDemux * dvdemux, GstStaticPadTemplate * template,
328 pad = gst_pad_new_from_static_template (template, template->name_template);
330 gst_pad_set_query_function (pad, GST_DEBUG_FUNCPTR (gst_dvdemux_src_query));
332 gst_pad_set_event_function (pad,
333 GST_DEBUG_FUNCPTR (gst_dvdemux_handle_src_event));
334 gst_pad_use_fixed_caps (pad);
335 gst_pad_set_active (pad, TRUE);
338 gst_pad_create_stream_id (pad,
339 GST_ELEMENT_CAST (dvdemux),
340 template == &video_src_temp ? "video" : "audio");
341 event = gst_event_new_stream_start (stream_id);
342 if (have_group_id (dvdemux))
343 gst_event_set_group_id (event, dvdemux->group_id);
344 gst_pad_push_event (pad, event);
347 gst_pad_set_caps (pad, caps);
349 gst_pad_push_event (pad, gst_event_new_segment (&dvdemux->time_segment));
351 gst_element_add_pad (GST_ELEMENT (dvdemux), pad);
353 if (!dvdemux->tag_event) {
354 dvdemux->tag_event = gst_dvdemux_create_global_tag_event (dvdemux);
357 if (dvdemux->tag_event) {
358 gst_pad_push_event (pad, gst_event_ref (dvdemux->tag_event));
365 gst_dvdemux_remove_pads (GstDVDemux * dvdemux)
367 if (dvdemux->videosrcpad) {
368 gst_element_remove_pad (GST_ELEMENT (dvdemux), dvdemux->videosrcpad);
369 dvdemux->videosrcpad = NULL;
371 if (dvdemux->audiosrcpad) {
372 gst_element_remove_pad (GST_ELEMENT (dvdemux), dvdemux->audiosrcpad);
373 dvdemux->audiosrcpad = NULL;
378 gst_dvdemux_src_convert (GstDVDemux * dvdemux, GstPad * pad,
379 GstFormat src_format, gint64 src_value, GstFormat dest_format,
384 if (dest_format == src_format || src_value == -1) {
385 *dest_value = src_value;
389 if (dvdemux->frame_len <= 0)
392 if (dvdemux->decoder == NULL)
395 GST_INFO_OBJECT (pad,
396 "src_value:%" G_GINT64_FORMAT ", src_format:%d, dest_format:%d",
397 src_value, src_format, dest_format);
399 switch (src_format) {
400 case GST_FORMAT_BYTES:
401 switch (dest_format) {
402 case GST_FORMAT_DEFAULT:
403 if (pad == dvdemux->videosrcpad)
404 *dest_value = src_value / dvdemux->frame_len;
405 else if (pad == dvdemux->audiosrcpad)
406 *dest_value = src_value / (2 * dvdemux->channels);
408 case GST_FORMAT_TIME:
409 if (pad == dvdemux->videosrcpad)
410 *dest_value = gst_util_uint64_scale (src_value,
411 GST_SECOND * dvdemux->framerate_denominator,
412 dvdemux->frame_len * dvdemux->framerate_numerator);
413 else if (pad == dvdemux->audiosrcpad)
414 *dest_value = gst_util_uint64_scale_int (src_value, GST_SECOND,
415 2 * dvdemux->frequency * dvdemux->channels);
421 case GST_FORMAT_TIME:
422 switch (dest_format) {
423 case GST_FORMAT_BYTES:
424 if (pad == dvdemux->videosrcpad)
425 *dest_value = gst_util_uint64_scale (src_value,
426 dvdemux->frame_len * dvdemux->framerate_numerator,
427 dvdemux->framerate_denominator * GST_SECOND);
428 else if (pad == dvdemux->audiosrcpad)
429 *dest_value = gst_util_uint64_scale_int (src_value,
430 2 * dvdemux->frequency * dvdemux->channels, GST_SECOND);
432 case GST_FORMAT_DEFAULT:
433 if (pad == dvdemux->videosrcpad) {
435 *dest_value = gst_util_uint64_scale (src_value,
436 dvdemux->framerate_numerator,
437 dvdemux->framerate_denominator * GST_SECOND);
440 } else if (pad == dvdemux->audiosrcpad) {
441 *dest_value = gst_util_uint64_scale (src_value,
442 dvdemux->frequency, GST_SECOND);
449 case GST_FORMAT_DEFAULT:
450 switch (dest_format) {
451 case GST_FORMAT_TIME:
452 if (pad == dvdemux->videosrcpad) {
453 *dest_value = gst_util_uint64_scale (src_value,
454 GST_SECOND * dvdemux->framerate_denominator,
455 dvdemux->framerate_numerator);
456 } else if (pad == dvdemux->audiosrcpad) {
458 *dest_value = gst_util_uint64_scale (src_value,
459 GST_SECOND, dvdemux->frequency);
464 case GST_FORMAT_BYTES:
465 if (pad == dvdemux->videosrcpad) {
466 *dest_value = src_value * dvdemux->frame_len;
467 } else if (pad == dvdemux->audiosrcpad) {
468 *dest_value = src_value * 2 * dvdemux->channels;
480 GST_INFO_OBJECT (pad,
481 "Result : dest_format:%d, dest_value:%" G_GINT64_FORMAT ", res:%d",
482 dest_format, *dest_value, res);
488 GST_INFO ("source conversion failed");
494 gst_dvdemux_sink_convert (GstDVDemux * dvdemux, GstFormat src_format,
495 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
499 GST_DEBUG_OBJECT (dvdemux, "%d -> %d", src_format, dest_format);
500 GST_INFO_OBJECT (dvdemux,
501 "src_value:%" G_GINT64_FORMAT ", src_format:%d, dest_format:%d",
502 src_value, src_format, dest_format);
504 if (dest_format == src_format || src_value == -1) {
505 *dest_value = src_value;
509 if (dvdemux->frame_len <= 0)
512 switch (src_format) {
513 case GST_FORMAT_BYTES:
514 switch (dest_format) {
515 case GST_FORMAT_TIME:
519 /* get frame number, rounds down so don't combine this
520 * line and the next line. */
521 frame = src_value / dvdemux->frame_len;
523 *dest_value = gst_util_uint64_scale (frame,
524 GST_SECOND * dvdemux->framerate_denominator,
525 dvdemux->framerate_numerator);
532 case GST_FORMAT_TIME:
533 switch (dest_format) {
534 case GST_FORMAT_BYTES:
538 /* calculate the frame */
540 gst_util_uint64_scale (src_value, dvdemux->framerate_numerator,
541 dvdemux->framerate_denominator * GST_SECOND);
543 /* calculate the offset from the rounded frame */
544 *dest_value = frame * dvdemux->frame_len;
554 GST_INFO_OBJECT (dvdemux,
555 "Result : dest_format:%d, dest_value:%" G_GINT64_FORMAT ", res:%d",
556 dest_format, *dest_value, res);
563 GST_INFO_OBJECT (dvdemux, "sink conversion failed");
569 gst_dvdemux_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
574 dvdemux = GST_DVDEMUX (parent);
576 switch (GST_QUERY_TYPE (query)) {
577 case GST_QUERY_POSITION:
582 /* get target format */
583 gst_query_parse_position (query, &format, NULL);
585 /* bring the position to the requested format. */
586 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
587 GST_FORMAT_TIME, dvdemux->time_segment.position,
590 gst_query_set_position (query, format, cur);
593 case GST_QUERY_DURATION:
599 /* First ask the peer in the original format */
600 if (!gst_pad_peer_query (dvdemux->sinkpad, query)) {
601 /* get target format */
602 gst_query_parse_duration (query, &format, NULL);
604 /* Now ask the peer in BYTES format and try to convert */
605 pquery = gst_query_new_duration (GST_FORMAT_BYTES);
606 if (!gst_pad_peer_query (dvdemux->sinkpad, pquery)) {
607 gst_query_unref (pquery);
611 /* get peer total length */
612 gst_query_parse_duration (pquery, NULL, &end);
613 gst_query_unref (pquery);
615 /* convert end to requested format */
617 if (!(res = gst_dvdemux_sink_convert (dvdemux,
618 GST_FORMAT_BYTES, end, format, &end))) {
621 gst_query_set_duration (query, format, end);
626 case GST_QUERY_CONVERT:
628 GstFormat src_fmt, dest_fmt;
629 gint64 src_val, dest_val;
631 gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
633 gst_dvdemux_src_convert (dvdemux, pad, src_fmt, src_val,
634 dest_fmt, &dest_val)))
636 gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
639 case GST_QUERY_SEEKING:
645 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
647 /* We can only handle TIME seeks really */
648 if (fmt != GST_FORMAT_TIME) {
649 gst_query_set_seeking (query, fmt, FALSE, -1, -1);
653 /* First ask upstream */
654 if (gst_pad_peer_query (dvdemux->sinkpad, query)) {
655 gst_query_parse_seeking (query, NULL, &seekable, NULL, NULL);
664 peerquery = gst_query_new_seeking (GST_FORMAT_BYTES);
665 seekable = gst_pad_peer_query (dvdemux->sinkpad, peerquery);
668 gst_query_parse_seeking (peerquery, NULL, &seekable, NULL, NULL);
669 gst_query_unref (peerquery);
672 peerquery = gst_query_new_duration (GST_FORMAT_TIME);
673 seekable = gst_dvdemux_src_query (pad, parent, peerquery);
678 gst_query_parse_duration (peerquery, NULL, &duration);
679 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
681 gst_query_set_seeking (query, GST_FORMAT_TIME, FALSE, -1, -1);
684 gst_query_unref (peerquery);
686 gst_query_set_seeking (query, GST_FORMAT_TIME, FALSE, -1, -1);
691 res = gst_pad_query_default (pad, parent, query);
700 GST_DEBUG ("error source query");
706 gst_dvdemux_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
711 dvdemux = GST_DVDEMUX (parent);
713 switch (GST_QUERY_TYPE (query)) {
714 case GST_QUERY_CONVERT:
716 GstFormat src_fmt, dest_fmt;
717 gint64 src_val, dest_val;
719 gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
721 gst_dvdemux_sink_convert (dvdemux, src_fmt, src_val, dest_fmt,
724 gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
728 res = gst_pad_query_default (pad, parent, query);
737 GST_DEBUG ("error handling sink query");
742 /* takes ownership of the event */
744 gst_dvdemux_push_event (GstDVDemux * dvdemux, GstEvent * event)
746 gboolean res = FALSE;
748 if (dvdemux->videosrcpad) {
749 gst_event_ref (event);
750 res |= gst_pad_push_event (dvdemux->videosrcpad, event);
753 if (dvdemux->audiosrcpad)
754 res |= gst_pad_push_event (dvdemux->audiosrcpad, event);
756 gst_event_unref (event);
764 gst_dvdemux_handle_sink_event (GstPad * pad, GstObject * parent,
767 GstDVDemux *dvdemux = GST_DVDEMUX (parent);
770 switch (GST_EVENT_TYPE (event)) {
771 case GST_EVENT_FLUSH_START:
772 /* we are not blocking on anything exect the push() calls
773 * to the peer which will be unblocked by forwarding the
775 res = gst_dvdemux_push_event (dvdemux, event);
777 case GST_EVENT_FLUSH_STOP:
778 gst_adapter_clear (dvdemux->adapter);
779 GST_DEBUG ("cleared adapter");
780 gst_segment_init (&dvdemux->byte_segment, GST_FORMAT_BYTES);
781 gst_segment_init (&dvdemux->time_segment, GST_FORMAT_TIME);
782 dvdemux->discont = TRUE;
783 res = gst_dvdemux_push_event (dvdemux, event);
785 case GST_EVENT_SEGMENT:
787 const GstSegment *segment;
789 gst_event_parse_segment (event, &segment);
790 switch (segment->format) {
791 case GST_FORMAT_BYTES:
792 gst_segment_copy_into (segment, &dvdemux->byte_segment);
793 dvdemux->need_segment = TRUE;
794 dvdemux->segment_seqnum = gst_event_get_seqnum (event);
795 gst_event_unref (event);
797 case GST_FORMAT_TIME:
798 gst_segment_copy_into (segment, &dvdemux->time_segment);
800 dvdemux->upstream_time_segment = TRUE;
801 dvdemux->segment_seqnum = gst_event_get_seqnum (event);
803 /* and we can just forward this time event */
804 res = gst_dvdemux_push_event (dvdemux, event);
807 gst_event_unref (event);
808 /* cannot accept this format */
815 /* flush any pending data, should be nothing left. */
816 gst_dvdemux_flush (dvdemux);
818 res = gst_dvdemux_push_event (dvdemux, event);
819 /* and clear the adapter */
820 gst_adapter_clear (dvdemux->adapter);
823 gst_event_unref (event);
826 res = gst_dvdemux_push_event (dvdemux, event);
833 /* convert a pair of values on the given srcpad */
835 gst_dvdemux_convert_src_pair (GstDVDemux * dvdemux, GstPad * pad,
836 GstFormat src_format, gint64 src_start, gint64 src_stop,
837 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
841 GST_INFO ("starting conversion of start");
842 /* bring the format to time on srcpad. */
843 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
844 src_format, src_start, dst_format, dst_start))) {
847 GST_INFO ("Finished conversion of start: %" G_GINT64_FORMAT, *dst_start);
849 GST_INFO ("starting conversion of stop");
850 /* bring the format to time on srcpad. */
851 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
852 src_format, src_stop, dst_format, dst_stop))) {
853 /* could not convert seek format to time offset */
856 GST_INFO ("Finished conversion of stop: %" G_GINT64_FORMAT, *dst_stop);
861 /* convert a pair of values on the sinkpad */
863 gst_dvdemux_convert_sink_pair (GstDVDemux * dvdemux,
864 GstFormat src_format, gint64 src_start, gint64 src_stop,
865 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
869 GST_INFO ("starting conversion of start");
870 /* bring the format to time on srcpad. */
871 if (!(res = gst_dvdemux_sink_convert (dvdemux,
872 src_format, src_start, dst_format, dst_start))) {
875 GST_INFO ("Finished conversion of start: %" G_GINT64_FORMAT, *dst_start);
877 GST_INFO ("starting conversion of stop");
878 /* bring the format to time on srcpad. */
879 if (!(res = gst_dvdemux_sink_convert (dvdemux,
880 src_format, src_stop, dst_format, dst_stop))) {
881 /* could not convert seek format to time offset */
884 GST_INFO ("Finished conversion of stop: %" G_GINT64_FORMAT, *dst_stop);
889 /* convert a pair of values on the srcpad to a pair of
890 * values on the sinkpad
893 gst_dvdemux_convert_src_to_sink (GstDVDemux * dvdemux, GstPad * pad,
894 GstFormat src_format, gint64 src_start, gint64 src_stop,
895 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
900 conv = GST_FORMAT_TIME;
901 /* convert to TIME intermediate format */
902 if (!(res = gst_dvdemux_convert_src_pair (dvdemux, pad,
903 src_format, src_start, src_stop, conv, dst_start, dst_stop))) {
904 /* could not convert format to time offset */
907 /* convert to dst format on sinkpad */
908 if (!(res = gst_dvdemux_convert_sink_pair (dvdemux,
909 conv, *dst_start, *dst_stop, dst_format, dst_start, dst_stop))) {
910 /* could not convert format to time offset */
919 gst_dvdemux_convert_segment (GstDVDemux * dvdemux, GstSegment * src,
922 dest->rate = src->rate;
923 dest->abs_rate = src->abs_rate;
924 dest->flags = src->flags;
930 /* handle seek in push base mode.
932 * Convert the time seek to a bytes seek and send it
934 * Does not take ownership of the event.
937 gst_dvdemux_handle_push_seek (GstDVDemux * dvdemux, GstPad * pad,
940 gboolean res = FALSE;
944 GstSeekType cur_type, stop_type;
946 gint64 start_position, end_position;
949 gst_event_parse_seek (event, &rate, &format, &flags,
950 &cur_type, &cur, &stop_type, &stop);
952 /* First try if upstream can handle time based seeks */
953 if (format == GST_FORMAT_TIME)
954 res = gst_pad_push_event (dvdemux->sinkpad, gst_event_ref (event));
957 /* we convert the start/stop on the srcpad to the byte format
958 * on the sinkpad and forward the event */
959 res = gst_dvdemux_convert_src_to_sink (dvdemux, pad,
960 format, cur, stop, GST_FORMAT_BYTES, &start_position, &end_position);
964 /* now this is the updated seek event on bytes */
965 newevent = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
966 cur_type, start_position, stop_type, end_position);
967 gst_event_set_seqnum (newevent, gst_event_get_seqnum (event));
969 res = gst_pad_push_event (dvdemux->sinkpad, newevent);
976 gst_dvdemux_update_frame_offsets (GstDVDemux * dvdemux, GstClockTime timestamp)
978 /* calculate current frame number */
979 gst_dvdemux_src_convert (dvdemux, dvdemux->videosrcpad,
980 dvdemux->time_segment.format, timestamp,
981 GST_FORMAT_DEFAULT, &dvdemux->video_offset);
983 /* calculate current audio number */
984 gst_dvdemux_src_convert (dvdemux, dvdemux->audiosrcpad,
985 dvdemux->time_segment.format, timestamp,
986 GST_FORMAT_DEFAULT, &dvdemux->audio_offset);
988 /* every DV frame corresponts with one video frame */
989 dvdemux->frame_offset = dvdemux->video_offset;
992 /* position ourselves to the configured segment, used in pull mode.
993 * The input segment is in TIME format. We convert the time values
994 * to bytes values into our byte_segment which we use to pull data from
998 gst_dvdemux_do_seek (GstDVDemux * demux, GstSegment * segment)
1003 /* position to value configured is last_stop, this will round down
1004 * to the byte position where the frame containing the given
1005 * timestamp can be found. */
1006 format = GST_FORMAT_BYTES;
1007 res = gst_dvdemux_sink_convert (demux,
1008 segment->format, segment->position,
1009 format, (gint64 *) & demux->byte_segment.position);
1013 /* update byte segment start */
1014 gst_dvdemux_sink_convert (demux,
1015 segment->format, segment->start, format,
1016 (gint64 *) & demux->byte_segment.start);
1018 /* update byte segment stop */
1019 gst_dvdemux_sink_convert (demux,
1020 segment->format, segment->stop, format,
1021 (gint64 *) & demux->byte_segment.stop);
1023 /* update byte segment time */
1024 gst_dvdemux_sink_convert (demux,
1025 segment->format, segment->time, format,
1026 (gint64 *) & demux->byte_segment.time);
1028 gst_dvdemux_update_frame_offsets (demux, segment->start);
1030 demux->discont = TRUE;
1036 /* handle seek in pull base mode.
1038 * Does not take ownership of the event.
1041 gst_dvdemux_handle_pull_seek (GstDVDemux * demux, GstPad * pad,
1048 GstSeekType cur_type, stop_type;
1052 GstSegment seeksegment;
1053 GstEvent *new_event;
1055 GST_DEBUG_OBJECT (demux, "doing seek");
1057 /* first bring the event format to TIME, our native format
1058 * to perform the seek on */
1062 gst_event_parse_seek (event, &rate, &format, &flags,
1063 &cur_type, &cur, &stop_type, &stop);
1065 /* can't seek backwards yet */
1069 /* convert input format to TIME */
1070 conv = GST_FORMAT_TIME;
1071 if (!(gst_dvdemux_convert_src_pair (demux, pad,
1072 format, cur, stop, conv, &cur, &stop)))
1075 format = GST_FORMAT_TIME;
1080 demux->segment_seqnum = gst_event_get_seqnum (event);
1082 flush = flags & GST_SEEK_FLAG_FLUSH;
1084 /* send flush start */
1086 new_event = gst_event_new_flush_start ();
1087 gst_event_set_seqnum (new_event, demux->segment_seqnum);
1088 gst_dvdemux_push_event (demux, new_event);
1090 gst_pad_pause_task (demux->sinkpad);
1093 /* grab streaming lock, this should eventually be possible, either
1094 * because the task is paused or our streaming thread stopped
1095 * because our peer is flushing. */
1096 GST_PAD_STREAM_LOCK (demux->sinkpad);
1098 /* make copy into temp structure, we can only update the main one
1099 * when the subclass actually could to the seek. */
1100 memcpy (&seeksegment, &demux->time_segment, sizeof (GstSegment));
1102 /* now configure the seek segment */
1104 gst_segment_do_seek (&seeksegment, rate, format, flags,
1105 cur_type, cur, stop_type, stop, &update);
1108 GST_DEBUG_OBJECT (demux, "segment configured from %" G_GINT64_FORMAT
1109 " to %" G_GINT64_FORMAT ", position %" G_GINT64_FORMAT,
1110 seeksegment.start, seeksegment.stop, seeksegment.position);
1112 /* do the seek, segment.position contains new position. */
1113 res = gst_dvdemux_do_seek (demux, &seeksegment);
1115 /* and prepare to continue streaming */
1117 /* send flush stop, peer will accept data and events again. We
1118 * are not yet providing data as we still have the STREAM_LOCK. */
1119 new_event = gst_event_new_flush_stop (TRUE);
1120 gst_event_set_seqnum (new_event, demux->segment_seqnum);
1121 gst_dvdemux_push_event (demux, new_event);
1124 /* if successfull seek, we update our real segment and push
1125 * out the new segment. */
1127 memcpy (&demux->time_segment, &seeksegment, sizeof (GstSegment));
1129 if (demux->time_segment.flags & GST_SEEK_FLAG_SEGMENT) {
1130 GstMessage *message;
1132 message = gst_message_new_segment_start (GST_OBJECT_CAST (demux),
1133 demux->time_segment.format, demux->time_segment.position);
1134 gst_message_set_seqnum (message, demux->segment_seqnum);
1135 gst_element_post_message (GST_ELEMENT_CAST (demux), message);
1137 if ((stop = demux->time_segment.stop) == -1)
1138 stop = demux->time_segment.duration;
1140 GST_INFO_OBJECT (demux,
1141 "Saving newsegment event to be sent in streaming thread");
1143 if (demux->pending_segment)
1144 gst_event_unref (demux->pending_segment);
1146 demux->pending_segment = gst_event_new_segment (&demux->time_segment);
1147 gst_event_set_seqnum (demux->pending_segment, demux->segment_seqnum);
1149 demux->need_segment = FALSE;
1152 /* and restart the task in case it got paused explicitely or by
1153 * the FLUSH_START event we pushed out. */
1154 gst_pad_start_task (demux->sinkpad, (GstTaskFunction) gst_dvdemux_loop,
1155 demux->sinkpad, NULL);
1157 /* and release the lock again so we can continue streaming */
1158 GST_PAD_STREAM_UNLOCK (demux->sinkpad);
1165 GST_DEBUG_OBJECT (demux, "negative playback rate %lf not supported.", rate);
1170 GST_DEBUG_OBJECT (demux, "cannot convert to TIME format, seek aborted.");
1176 gst_dvdemux_send_event (GstElement * element, GstEvent * event)
1178 GstDVDemux *dvdemux = GST_DVDEMUX (element);
1179 gboolean res = FALSE;
1181 switch (GST_EVENT_TYPE (event)) {
1182 case GST_EVENT_SEEK:
1184 /* checking header and configuring the seek must be atomic */
1185 GST_OBJECT_LOCK (dvdemux);
1186 if (g_atomic_int_get (&dvdemux->found_header) == 0) {
1189 event_p = &dvdemux->seek_event;
1191 /* We don't have pads yet. Keep the event. */
1192 GST_INFO_OBJECT (dvdemux, "Keeping the seek event for later");
1194 gst_event_replace (event_p, event);
1195 GST_OBJECT_UNLOCK (dvdemux);
1199 GST_OBJECT_UNLOCK (dvdemux);
1201 if (dvdemux->seek_handler)
1202 res = dvdemux->seek_handler (dvdemux, dvdemux->videosrcpad, event);
1203 gst_event_unref (event);
1208 res = GST_ELEMENT_CLASS (parent_class)->send_event (element, event);
1215 /* handle an event on the source pad, it's most likely a seek */
1217 gst_dvdemux_handle_src_event (GstPad * pad, GstObject * parent,
1220 gboolean res = FALSE;
1221 GstDVDemux *dvdemux;
1223 dvdemux = GST_DVDEMUX (parent);
1225 switch (GST_EVENT_TYPE (event)) {
1226 case GST_EVENT_SEEK:
1227 /* seek handler is installed based on scheduling mode */
1228 if (dvdemux->seek_handler)
1229 res = dvdemux->seek_handler (dvdemux, pad, event);
1230 gst_event_unref (event);
1233 res = gst_pad_push_event (dvdemux->sinkpad, event);
1240 /* does not take ownership of buffer */
1241 static GstFlowReturn
1242 gst_dvdemux_demux_audio (GstDVDemux * dvdemux, GstBuffer * buffer,
1249 gst_buffer_map (buffer, &map, GST_MAP_READ);
1250 dv_decode_full_audio (dvdemux->decoder, map.data, dvdemux->audio_buffers);
1251 gst_buffer_unmap (buffer, &map);
1253 if (G_LIKELY ((num_samples = dv_get_num_samples (dvdemux->decoder)) > 0)) {
1257 gint frequency, channels;
1259 /* get initial format or check if format changed */
1260 frequency = dv_get_frequency (dvdemux->decoder);
1261 channels = dv_get_num_channels (dvdemux->decoder);
1263 if (G_UNLIKELY ((dvdemux->audiosrcpad == NULL)
1264 || (frequency != dvdemux->frequency)
1265 || (channels != dvdemux->channels))) {
1269 dvdemux->frequency = frequency;
1270 dvdemux->channels = channels;
1272 gst_audio_info_init (&info);
1273 gst_audio_info_set_format (&info, GST_AUDIO_FORMAT_S16LE,
1274 frequency, channels, NULL);
1275 caps = gst_audio_info_to_caps (&info);
1276 if (G_UNLIKELY (dvdemux->audiosrcpad == NULL)) {
1277 dvdemux->audiosrcpad =
1278 gst_dvdemux_add_pad (dvdemux, &audio_src_temp, caps);
1280 if (dvdemux->videosrcpad && dvdemux->audiosrcpad)
1281 gst_element_no_more_pads (GST_ELEMENT (dvdemux));
1284 gst_pad_set_caps (dvdemux->audiosrcpad, caps);
1286 gst_caps_unref (caps);
1289 outbuf = gst_buffer_new_and_alloc (num_samples *
1290 sizeof (gint16) * dvdemux->channels);
1292 gst_buffer_map (outbuf, &map, GST_MAP_WRITE);
1293 a_ptr = (gint16 *) map.data;
1295 for (i = 0; i < num_samples; i++) {
1296 for (j = 0; j < dvdemux->channels; j++) {
1297 *(a_ptr++) = dvdemux->audio_buffers[j][i];
1300 gst_buffer_unmap (outbuf, &map);
1302 GST_DEBUG ("pushing audio %" GST_TIME_FORMAT,
1303 GST_TIME_ARGS (dvdemux->time_segment.position));
1305 GST_BUFFER_TIMESTAMP (outbuf) = dvdemux->time_segment.position;
1306 GST_BUFFER_DURATION (outbuf) = duration;
1307 GST_BUFFER_OFFSET (outbuf) = dvdemux->audio_offset;
1308 dvdemux->audio_offset += num_samples;
1309 GST_BUFFER_OFFSET_END (outbuf) = dvdemux->audio_offset;
1311 if (dvdemux->new_media || dvdemux->discont)
1312 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
1313 ret = gst_pad_push (dvdemux->audiosrcpad, outbuf);
1322 /* takes ownership of buffer */
1323 static GstFlowReturn
1324 gst_dvdemux_demux_video (GstDVDemux * dvdemux, GstBuffer * buffer,
1330 GstFlowReturn ret = GST_FLOW_OK;
1333 /* framerate is already up-to-date */
1334 height = dvdemux->decoder->height;
1335 wide = dv_format_wide (dvdemux->decoder);
1337 /* see if anything changed */
1338 if (G_UNLIKELY ((dvdemux->videosrcpad == NULL) || (dvdemux->height != height)
1339 || dvdemux->wide != wide)) {
1343 dvdemux->height = height;
1344 dvdemux->wide = wide;
1346 if (dvdemux->decoder->system == e_dv_system_625_50) {
1348 par_x = PAL_WIDE_PAR_X;
1349 par_y = PAL_WIDE_PAR_Y;
1351 par_x = PAL_NORMAL_PAR_X;
1352 par_y = PAL_NORMAL_PAR_Y;
1356 par_x = NTSC_WIDE_PAR_X;
1357 par_y = NTSC_WIDE_PAR_Y;
1359 par_x = NTSC_NORMAL_PAR_X;
1360 par_y = NTSC_NORMAL_PAR_Y;
1364 caps = gst_caps_new_simple ("video/x-dv",
1365 "systemstream", G_TYPE_BOOLEAN, FALSE,
1366 "width", G_TYPE_INT, 720,
1367 "height", G_TYPE_INT, height,
1368 "framerate", GST_TYPE_FRACTION, dvdemux->framerate_numerator,
1369 dvdemux->framerate_denominator,
1370 "pixel-aspect-ratio", GST_TYPE_FRACTION, par_x, par_y, NULL);
1372 if (G_UNLIKELY (dvdemux->videosrcpad == NULL)) {
1373 dvdemux->videosrcpad =
1374 gst_dvdemux_add_pad (dvdemux, &video_src_temp, caps);
1376 if (dvdemux->videosrcpad && dvdemux->audiosrcpad)
1377 gst_element_no_more_pads (GST_ELEMENT (dvdemux));
1380 gst_pad_set_caps (dvdemux->videosrcpad, caps);
1382 gst_caps_unref (caps);
1385 /* takes ownership of buffer here, we just need to modify
1387 outbuf = gst_buffer_make_writable (buffer);
1389 GST_BUFFER_TIMESTAMP (outbuf) = dvdemux->time_segment.position;
1390 GST_BUFFER_OFFSET (outbuf) = dvdemux->video_offset;
1391 GST_BUFFER_OFFSET_END (outbuf) = dvdemux->video_offset + 1;
1392 GST_BUFFER_DURATION (outbuf) = duration;
1394 if (dvdemux->new_media || dvdemux->discont)
1395 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
1397 GST_DEBUG ("pushing video %" GST_TIME_FORMAT,
1398 GST_TIME_ARGS (dvdemux->time_segment.position));
1400 ret = gst_pad_push (dvdemux->videosrcpad, outbuf);
1402 dvdemux->video_offset++;
1408 get_ssyb_offset (int dif, int ssyb)
1412 offset = dif * 12000; /* to dif */
1413 offset += 80 * (1 + (ssyb / 6)); /* to subcode pack */
1414 offset += 3; /* past header */
1415 offset += 8 * (ssyb % 6); /* to ssyb */
1421 gst_dvdemux_get_timecode (GstDVDemux * dvdemux, GstBuffer * buffer,
1422 GstSMPTETimeCode * timecode)
1428 int n_difs = dvdemux->decoder->num_dif_seqs;
1430 gst_buffer_map (buffer, &map, GST_MAP_READ);
1432 for (dif = 0; dif < n_difs; dif++) {
1433 offset = get_ssyb_offset (dif, 3);
1434 if (data[offset + 3] == 0x13) {
1435 timecode->frames = ((data[offset + 4] >> 4) & 0x3) * 10 +
1436 (data[offset + 4] & 0xf);
1437 timecode->seconds = ((data[offset + 5] >> 4) & 0x3) * 10 +
1438 (data[offset + 5] & 0xf);
1439 timecode->minutes = ((data[offset + 6] >> 4) & 0x3) * 10 +
1440 (data[offset + 6] & 0xf);
1441 timecode->hours = ((data[offset + 7] >> 4) & 0x3) * 10 +
1442 (data[offset + 7] & 0xf);
1443 GST_DEBUG ("got timecode %" GST_SMPTE_TIME_CODE_FORMAT,
1444 GST_SMPTE_TIME_CODE_ARGS (timecode));
1445 gst_buffer_unmap (buffer, &map);
1450 gst_buffer_unmap (buffer, &map);
1455 gst_dvdemux_is_new_media (GstDVDemux * dvdemux, GstBuffer * buffer)
1463 n_difs = dvdemux->decoder->num_dif_seqs;
1465 gst_buffer_map (buffer, &map, GST_MAP_READ);
1467 for (dif = 0; dif < n_difs; dif++) {
1469 aaux_offset = (dif * 12000) + (6 + 16 * 1) * 80 + 3;
1471 aaux_offset = (dif * 12000) + (6 + 16 * 4) * 80 + 3;
1473 if (data[aaux_offset + 0] == 0x51) {
1474 if ((data[aaux_offset + 2] & 0x80) == 0) {
1475 gst_buffer_unmap (buffer, &map);
1481 gst_buffer_unmap (buffer, &map);
1485 /* takes ownership of buffer */
1486 static GstFlowReturn
1487 gst_dvdemux_demux_frame (GstDVDemux * dvdemux, GstBuffer * buffer)
1489 GstClockTime next_ts;
1490 GstFlowReturn aret, vret, ret;
1493 GstSMPTETimeCode timecode;
1496 if (dvdemux->need_segment) {
1500 g_assert (!dvdemux->upstream_time_segment);
1502 /* convert to time and store as start/end_timestamp */
1503 format = GST_FORMAT_TIME;
1504 if (!(gst_dvdemux_convert_sink_pair (dvdemux,
1505 GST_FORMAT_BYTES, dvdemux->byte_segment.start,
1506 dvdemux->byte_segment.stop, format,
1507 (gint64 *) & dvdemux->time_segment.start,
1508 (gint64 *) & dvdemux->time_segment.stop)))
1511 dvdemux->time_segment.time = dvdemux->time_segment.start;
1512 dvdemux->time_segment.rate = dvdemux->byte_segment.rate;
1514 gst_dvdemux_sink_convert (dvdemux,
1515 GST_FORMAT_BYTES, dvdemux->byte_segment.position,
1516 GST_FORMAT_TIME, (gint64 *) & dvdemux->time_segment.position);
1518 gst_dvdemux_update_frame_offsets (dvdemux, dvdemux->time_segment.position);
1520 GST_DEBUG_OBJECT (dvdemux, "sending segment start: %" GST_TIME_FORMAT
1521 ", stop: %" GST_TIME_FORMAT ", time: %" GST_TIME_FORMAT,
1522 GST_TIME_ARGS (dvdemux->time_segment.start),
1523 GST_TIME_ARGS (dvdemux->time_segment.stop),
1524 GST_TIME_ARGS (dvdemux->time_segment.start));
1526 event = gst_event_new_segment (&dvdemux->time_segment);
1527 if (dvdemux->segment_seqnum)
1528 gst_event_set_seqnum (event, dvdemux->segment_seqnum);
1529 gst_dvdemux_push_event (dvdemux, event);
1531 dvdemux->need_segment = FALSE;
1534 gst_dvdemux_get_timecode (dvdemux, buffer, &timecode);
1535 gst_smpte_time_code_get_frame_number (
1536 (dvdemux->decoder->system == e_dv_system_625_50) ?
1537 GST_SMPTE_TIME_CODE_SYSTEM_25 : GST_SMPTE_TIME_CODE_SYSTEM_30,
1538 &frame_number, &timecode);
1540 if (dvdemux->time_segment.rate < 0) {
1541 next_ts = gst_util_uint64_scale_int (
1542 (dvdemux->frame_offset >
1543 0 ? dvdemux->frame_offset - 1 : 0) * GST_SECOND,
1544 dvdemux->framerate_denominator, dvdemux->framerate_numerator);
1545 duration = dvdemux->time_segment.position - next_ts;
1547 next_ts = gst_util_uint64_scale_int (
1548 (dvdemux->frame_offset + 1) * GST_SECOND,
1549 dvdemux->framerate_denominator, dvdemux->framerate_numerator);
1550 duration = next_ts - dvdemux->time_segment.position;
1553 gst_buffer_map (buffer, &map, GST_MAP_READ);
1554 dv_parse_packs (dvdemux->decoder, map.data);
1555 gst_buffer_unmap (buffer, &map);
1556 dvdemux->new_media = FALSE;
1557 if (gst_dvdemux_is_new_media (dvdemux, buffer) &&
1558 dvdemux->frames_since_new_media > 2) {
1559 dvdemux->new_media = TRUE;
1560 dvdemux->frames_since_new_media = 0;
1562 dvdemux->frames_since_new_media++;
1564 /* does not take ownership of buffer */
1565 aret = ret = gst_dvdemux_demux_audio (dvdemux, buffer, duration);
1566 if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED)) {
1567 gst_buffer_unref (buffer);
1571 /* takes ownership of buffer */
1572 vret = ret = gst_dvdemux_demux_video (dvdemux, buffer, duration);
1573 if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED))
1576 /* if both are not linked, we stop */
1577 if (G_UNLIKELY (aret == GST_FLOW_NOT_LINKED && vret == GST_FLOW_NOT_LINKED)) {
1578 ret = GST_FLOW_NOT_LINKED;
1582 dvdemux->discont = FALSE;
1583 dvdemux->time_segment.position = next_ts;
1585 if (dvdemux->time_segment.rate < 0) {
1586 if (dvdemux->frame_offset > 0)
1587 dvdemux->frame_offset--;
1589 GST_WARNING_OBJECT (dvdemux,
1590 "Got before frame offset 0 in reverse playback");
1592 dvdemux->frame_offset++;
1595 /* check for the end of the segment */
1596 if ((dvdemux->time_segment.rate > 0 && dvdemux->time_segment.stop != -1
1597 && next_ts > dvdemux->time_segment.stop)
1598 || (dvdemux->time_segment.rate < 0
1599 && dvdemux->time_segment.start > next_ts))
1610 GST_DEBUG ("error generating new_segment event");
1611 gst_buffer_unref (buffer);
1612 return GST_FLOW_ERROR;
1616 /* flush any remaining data in the adapter, used in chain based scheduling mode */
1617 static GstFlowReturn
1618 gst_dvdemux_flush (GstDVDemux * dvdemux)
1620 GstFlowReturn ret = GST_FLOW_OK;
1622 while (gst_adapter_available (dvdemux->adapter) >= dvdemux->frame_len) {
1626 /* get the accumulated bytes */
1627 data = gst_adapter_map (dvdemux->adapter, dvdemux->frame_len);
1629 /* parse header to know the length and other params */
1630 if (G_UNLIKELY (dv_parse_header (dvdemux->decoder, data) < 0)) {
1631 gst_adapter_unmap (dvdemux->adapter);
1632 goto parse_header_error;
1634 gst_adapter_unmap (dvdemux->adapter);
1636 /* after parsing the header we know the length of the data */
1637 length = dvdemux->frame_len = dvdemux->decoder->frame_size;
1638 if (dvdemux->decoder->system == e_dv_system_625_50) {
1639 dvdemux->framerate_numerator = PAL_FRAMERATE_NUMERATOR;
1640 dvdemux->framerate_denominator = PAL_FRAMERATE_DENOMINATOR;
1642 dvdemux->framerate_numerator = NTSC_FRAMERATE_NUMERATOR;
1643 dvdemux->framerate_denominator = NTSC_FRAMERATE_DENOMINATOR;
1645 g_atomic_int_set (&dvdemux->found_header, 1);
1647 /* let demux_video set the height, it needs to detect when things change so
1648 * it can reset caps */
1650 /* if we still have enough for a frame, start decoding */
1651 if (G_LIKELY (gst_adapter_available (dvdemux->adapter) >= length)) {
1654 buffer = gst_adapter_take_buffer (dvdemux->adapter, length);
1656 /* and decode the buffer, takes ownership */
1657 ret = gst_dvdemux_demux_frame (dvdemux, buffer);
1658 if (G_UNLIKELY (ret != GST_FLOW_OK))
1668 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1669 (NULL), ("Error parsing DV header"));
1670 return GST_FLOW_ERROR;
1674 /* streaming operation:
1676 * accumulate data until we have a frame, then decode.
1678 static GstFlowReturn
1679 gst_dvdemux_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
1681 GstDVDemux *dvdemux;
1683 GstClockTime timestamp;
1685 dvdemux = GST_DVDEMUX (parent);
1687 /* a discontinuity in the stream, we need to get rid of
1688 * accumulated data in the adapter and assume a new frame
1689 * starts after the discontinuity */
1690 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
1691 gst_adapter_clear (dvdemux->adapter);
1692 dvdemux->discont = TRUE;
1694 /* Should recheck where we are */
1695 if (!dvdemux->upstream_time_segment)
1696 dvdemux->need_segment = TRUE;
1699 /* a timestamp always should be respected */
1700 timestamp = GST_BUFFER_TIMESTAMP (buffer);
1701 if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
1702 dvdemux->time_segment.position = timestamp;
1704 if (dvdemux->discont)
1705 gst_dvdemux_update_frame_offsets (dvdemux,
1706 dvdemux->time_segment.position);
1707 } else if (dvdemux->upstream_time_segment && dvdemux->discont) {
1708 /* This will probably fail later to provide correct
1709 * timestamps and/or durations but also should not happen */
1710 GST_ERROR_OBJECT (dvdemux,
1711 "Upstream provides TIME segment but no PTS after discont");
1714 gst_adapter_push (dvdemux->adapter, buffer);
1716 /* Apparently dv_parse_header can read from the body of the frame
1717 * too, so it needs more than header_size bytes. Wacky!
1719 if (G_UNLIKELY (dvdemux->frame_len == -1)) {
1720 /* if we don't know the length of a frame, we assume it is
1721 * the NTSC_BUFFER length, as this is enough to figure out
1722 * if this is PAL or NTSC */
1723 dvdemux->frame_len = NTSC_BUFFER;
1726 /* and try to flush pending frames */
1727 ret = gst_dvdemux_flush (dvdemux);
1732 /* pull based operation.
1734 * Read header first to figure out the frame size. Then read
1735 * and decode full frames.
1738 gst_dvdemux_loop (GstPad * pad)
1741 GstDVDemux *dvdemux;
1742 GstBuffer *buffer = NULL;
1745 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
1747 if (G_UNLIKELY (g_atomic_int_get (&dvdemux->found_header) == 0)) {
1748 GST_DEBUG_OBJECT (dvdemux, "pulling first buffer");
1749 /* pull in NTSC sized buffer to figure out the frame
1751 ret = gst_pad_pull_range (dvdemux->sinkpad,
1752 dvdemux->byte_segment.position, NTSC_BUFFER, &buffer);
1753 if (G_UNLIKELY (ret != GST_FLOW_OK))
1756 /* check buffer size, don't want to read small buffers */
1757 if (G_UNLIKELY (gst_buffer_get_size (buffer) < NTSC_BUFFER))
1760 gst_buffer_map (buffer, &map, GST_MAP_READ);
1761 /* parse header to know the length and other params */
1762 if (G_UNLIKELY (dv_parse_header (dvdemux->decoder, map.data) < 0)) {
1763 gst_buffer_unmap (buffer, &map);
1764 goto parse_header_error;
1766 gst_buffer_unmap (buffer, &map);
1768 /* after parsing the header we know the length of the data */
1769 dvdemux->frame_len = dvdemux->decoder->frame_size;
1770 if (dvdemux->decoder->system == e_dv_system_625_50) {
1771 dvdemux->framerate_numerator = PAL_FRAMERATE_NUMERATOR;
1772 dvdemux->framerate_denominator = PAL_FRAMERATE_DENOMINATOR;
1774 dvdemux->framerate_numerator = NTSC_FRAMERATE_NUMERATOR;
1775 dvdemux->framerate_denominator = NTSC_FRAMERATE_DENOMINATOR;
1777 dvdemux->need_segment = TRUE;
1779 /* see if we need to read a larger part */
1780 if (dvdemux->frame_len != NTSC_BUFFER) {
1781 gst_buffer_unref (buffer);
1788 /* setting header and prrforming the seek must be atomic */
1789 GST_OBJECT_LOCK (dvdemux);
1790 /* got header now */
1791 g_atomic_int_set (&dvdemux->found_header, 1);
1793 /* now perform pending seek if any. */
1794 event = dvdemux->seek_event;
1796 gst_event_ref (event);
1797 GST_OBJECT_UNLOCK (dvdemux);
1800 if (!gst_dvdemux_handle_pull_seek (dvdemux, dvdemux->videosrcpad,
1802 GST_ELEMENT_WARNING (dvdemux, STREAM, DECODE, (NULL),
1803 ("Error perfoming initial seek"));
1805 gst_event_unref (event);
1807 /* and we need to pull a new buffer in all cases. */
1809 gst_buffer_unref (buffer);
1816 if (G_UNLIKELY (dvdemux->pending_segment)) {
1818 /* now send the newsegment */
1819 GST_DEBUG_OBJECT (dvdemux, "Sending newsegment from");
1821 gst_dvdemux_push_event (dvdemux, dvdemux->pending_segment);
1822 dvdemux->pending_segment = NULL;
1825 if (G_LIKELY (buffer == NULL)) {
1826 GST_DEBUG_OBJECT (dvdemux, "pulling buffer at offset %" G_GINT64_FORMAT,
1827 dvdemux->byte_segment.position);
1829 ret = gst_pad_pull_range (dvdemux->sinkpad,
1830 dvdemux->byte_segment.position, dvdemux->frame_len, &buffer);
1831 if (ret != GST_FLOW_OK)
1834 /* check buffer size, don't want to read small buffers */
1835 if (gst_buffer_get_size (buffer) < dvdemux->frame_len)
1838 /* and decode the buffer */
1839 ret = gst_dvdemux_demux_frame (dvdemux, buffer);
1840 if (G_UNLIKELY (ret != GST_FLOW_OK))
1843 /* and position ourselves for the next buffer */
1844 dvdemux->byte_segment.position += dvdemux->frame_len;
1847 gst_object_unref (dvdemux);
1856 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1857 (NULL), ("Error parsing DV header"));
1858 gst_buffer_unref (buffer);
1859 gst_pad_pause_task (dvdemux->sinkpad);
1860 event = gst_event_new_eos ();
1861 if (dvdemux->segment_seqnum)
1862 gst_event_set_seqnum (event, dvdemux->segment_seqnum);
1863 gst_dvdemux_push_event (dvdemux, event);
1870 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1871 (NULL), ("Error reading buffer"));
1872 gst_buffer_unref (buffer);
1873 gst_pad_pause_task (dvdemux->sinkpad);
1874 event = gst_event_new_eos ();
1875 if (dvdemux->segment_seqnum)
1876 gst_event_set_seqnum (event, dvdemux->segment_seqnum);
1877 gst_dvdemux_push_event (dvdemux, event);
1882 GST_INFO_OBJECT (dvdemux, "pausing task, %s", gst_flow_get_name (ret));
1883 gst_pad_pause_task (dvdemux->sinkpad);
1884 if (ret == GST_FLOW_EOS) {
1885 GST_LOG_OBJECT (dvdemux, "got eos");
1886 /* so align our position with the end of it, if there is one
1887 * this ensures a subsequent will arrive at correct base/acc time */
1888 if (dvdemux->time_segment.rate > 0.0 &&
1889 GST_CLOCK_TIME_IS_VALID (dvdemux->time_segment.stop))
1890 dvdemux->time_segment.position = dvdemux->time_segment.stop;
1891 else if (dvdemux->time_segment.rate < 0.0)
1892 dvdemux->time_segment.position = dvdemux->time_segment.start;
1893 /* perform EOS logic */
1894 if (dvdemux->time_segment.flags & GST_SEEK_FLAG_SEGMENT) {
1895 GstMessage *message;
1898 event = gst_event_new_segment_done (dvdemux->time_segment.format,
1899 dvdemux->time_segment.position);
1900 if (dvdemux->segment_seqnum)
1901 gst_event_set_seqnum (event, dvdemux->segment_seqnum);
1903 message = gst_message_new_segment_done (GST_OBJECT_CAST (dvdemux),
1904 dvdemux->time_segment.format, dvdemux->time_segment.position);
1905 if (dvdemux->segment_seqnum)
1906 gst_message_set_seqnum (message, dvdemux->segment_seqnum);
1908 gst_element_post_message (GST_ELEMENT (dvdemux), message);
1909 gst_dvdemux_push_event (dvdemux, event);
1911 GstEvent *event = gst_event_new_eos ();
1912 if (dvdemux->segment_seqnum)
1913 gst_event_set_seqnum (event, dvdemux->segment_seqnum);
1914 gst_dvdemux_push_event (dvdemux, event);
1916 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
1917 GstEvent *event = gst_event_new_eos ();
1918 /* for fatal errors or not-linked we post an error message */
1919 GST_ELEMENT_FLOW_ERROR (dvdemux, ret);
1920 if (dvdemux->segment_seqnum)
1921 gst_event_set_seqnum (event, dvdemux->segment_seqnum);
1922 gst_dvdemux_push_event (dvdemux, event);
1929 gst_dvdemux_sink_activate_mode (GstPad * sinkpad, GstObject * parent,
1930 GstPadMode mode, gboolean active)
1933 GstDVDemux *demux = GST_DVDEMUX (parent);
1936 case GST_PAD_MODE_PULL:
1938 demux->seek_handler = gst_dvdemux_handle_pull_seek;
1939 res = gst_pad_start_task (sinkpad,
1940 (GstTaskFunction) gst_dvdemux_loop, sinkpad, NULL);
1942 demux->seek_handler = NULL;
1943 res = gst_pad_stop_task (sinkpad);
1946 case GST_PAD_MODE_PUSH:
1948 GST_DEBUG_OBJECT (demux, "activating push/chain function");
1949 demux->seek_handler = gst_dvdemux_handle_push_seek;
1951 GST_DEBUG_OBJECT (demux, "deactivating push/chain function");
1952 demux->seek_handler = NULL;
1963 /* decide on push or pull based scheduling */
1965 gst_dvdemux_sink_activate (GstPad * sinkpad, GstObject * parent)
1970 query = gst_query_new_scheduling ();
1972 if (!gst_pad_peer_query (sinkpad, query)) {
1973 gst_query_unref (query);
1977 pull_mode = gst_query_has_scheduling_mode_with_flags (query,
1978 GST_PAD_MODE_PULL, GST_SCHEDULING_FLAG_SEEKABLE);
1979 gst_query_unref (query);
1984 GST_DEBUG_OBJECT (sinkpad, "activating pull");
1985 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE);
1989 GST_DEBUG_OBJECT (sinkpad, "activating push");
1990 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
1994 static GstStateChangeReturn
1995 gst_dvdemux_change_state (GstElement * element, GstStateChange transition)
1997 GstDVDemux *dvdemux = GST_DVDEMUX (element);
1998 GstStateChangeReturn ret;
2000 switch (transition) {
2001 case GST_STATE_CHANGE_NULL_TO_READY:
2003 case GST_STATE_CHANGE_READY_TO_PAUSED:
2004 dvdemux->decoder = dv_decoder_new (0, FALSE, FALSE);
2005 dv_set_error_log (dvdemux->decoder, NULL);
2006 gst_dvdemux_reset (dvdemux);
2008 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
2014 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
2016 switch (transition) {
2017 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
2019 case GST_STATE_CHANGE_PAUSED_TO_READY:
2020 gst_adapter_clear (dvdemux->adapter);
2021 dv_decoder_free (dvdemux->decoder);
2022 dvdemux->decoder = NULL;
2024 gst_dvdemux_remove_pads (dvdemux);
2026 if (dvdemux->tag_event) {
2027 gst_event_unref (dvdemux->tag_event);
2028 dvdemux->tag_event = NULL;
2032 case GST_STATE_CHANGE_READY_TO_NULL:
2036 event_p = &dvdemux->seek_event;
2037 gst_event_replace (event_p, NULL);
2038 if (dvdemux->pending_segment)
2039 gst_event_unref (dvdemux->pending_segment);
2040 dvdemux->pending_segment = NULL;